Sickle-grinder.



No. 629,798. Patented Aug. I, |899.

J. MACPHAIL.

SICKLE GRINDER.

(Application led Oct, 3, 1898.)

No. 629,798. Patented Aug. I, |889.

d. MACPHAIL.

SICKLE GRINDER.

(Appliegtion 51nd Oct. B, 1898.) (No Model.) 2 Sheets-Shag( 2.

JAMES 'MACPI-IAIL, OF BLUE ISLAND,

.PA rniwr OFFICE.

ILLINOIS, ASSIGNOR TO THE PLANO MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS.

SICKLE-GRINDER.

SPECIFICATINAformng part of Letters Patent No. 629,798, dated August 1, 1899.

Application tiled October 3, 1893.

Serial No. 692,490. (No modeld To @ZZ whom, it may concern,.- A

Be it known that I, JAMES MACPHAIL, a citizen of the United States, residing at Blue Island, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Sickle-Grinders, of which the following is a specification.

My invention has relation to sickle-grinders; and its object is to provide a simple and efficient device particularly adapted for the grinding of sickle-sections of harvesters, mow ers, and the like. Y

My sickle-grinder embodiesnovel and advautageous features of construction and operation, which Iwill be apparent from the description hereinafter given.

In the drawings, Figure 1 isa plan View showing my sickie-grinder attached for con-l venience to the master or bnll'wheel` of Aa har-- vester or mower; Fig. 2, a side elevation'there` of Fig. 3, an end elevation thereof; and Fig. 4, a detail view on line t of Eig. 2, showing the means for holding together the two parts of the sickle-bar-supporting frame.

The grinder, as shown, comprises a frame consisting of a base or lower portion 1 and an upright or standard 2, at whose top is formed. a journal 3. The frame is provided with a short shaft 4, on which rotates the driving gear-wheel 5, to which is attached any ordinary handle, such as (i. The journal 3 pro Vides a bearing for the shaft 7, which carries at one end a vpinion 8, meshing with the drivingfwheel 5, 'and at the other end an emery or sand wheel 9, which I will termtor convenience the grinding-wheel.

Upon the base portion 1 is cast or otherwise form ed or arranged a pivot-pin 10, upon which is pivoted a movable base or member 11 having ears or lugs 12 projecting downward on either side ot' the base portion 1. This member has a limited movement on its pivotpin, and the amount of this movement is adjustable by means ot' the screws 13, which adjustment'is for a purpose hereinafter apparent. Y

The means for supporting the sickle-bar (a. portion of the bar being shown inthe drawings)and Vfor. presenting the sickle-bar to thev grinding-wheel comprises a frame 15, having `arms 16 pivoted Vto the ends of the member `11,

as shown in Figs. 2 and 3. The frame has a seriesof upwardly-extending projections 17, whose ends are turned inwardly to form a socket to receive the sickle-bary proper. AA supplemental vangular frame 18 is loosely mounted on the frame 15 and is provided at its ends withfcurved lingers 19, extending to- 'ward :and close'to the inturned ends of the projections 17. f' This frame 18 has atits mid- 6o kdie. portion a'lug 20, projecting through the ,frame v15V and carrying a rotating cam 21, op- Ierated by a handle 22 and adapted to contact lthe side of theframe 15. The object of this construction is to bring the two frames to- .65 getherand to clamp the sickle-bar therebetween.

The under side of the hase 1 is lprovided with a stationary hook portion 23 and with a lug-24,having a screw-threaded hole receiv- 7o ing a screw-threaded rod 25, operated by a handle`26. This'rod carries loosely a hookshaped piece 27, which cooperates with the vhook 23 to en gage the object or stand to which thev grinder is to be attached. In the draw-7 5 `ings I have shown it attached to the bullwhee1'28of a harvester or mower, which is an easy and ready place of attachment; but it will be understood that I do not limit myself to this particular piace of and arrange- 8o ment for attachment of my sickle-grinder.

The operation ot mysickle-grinder is as follows: The cam is turned to allow the sicklebar-supporting frames toopen, and the sicklebar is then inserted and the cam shifted to clamp the sickle-bar4 therebetween. VThe object of the adjustment of the movable base 11 by means of the set-screws is to. providel for longl and short knife-sections, the adjustment being varied according to the length'of 9c the knife-section- The frames are adapted to swing up to present the sickle-sections to the grinding-Wheel, and one cutting edge of one knife-section will be ground whenv the frame is turned-in one direction and one cut- 9 5 ting edge of another knife-section will be ground when the frame is turned in theOther direction. When two cutting edges are thus ground, the cam isag'ain operated and the sickle-bar advanced, andfso on untilfthe oproo eration is completed. f

Although I have described more or less precise forms and details of construction, I do not wish to be understood as limiting myselt thereto, as I contemplate changes in form, the proportion of parts, and the substitution of equivalents as circumstances may suggest or render expedient andwithout departing from the spirit of my invention.

I claiml. A sickle grinder comprising a main frame, a grinding-wheel mounted therein and rotatable in a plane substantially parallel to the sickle-bar presented thereto, means for rotating said wheel, a sickle-bar-supporting frame having a rotating movement on the lnain frame in a horizontal plane and also a free swinging movement in a vertical plane, said supporting-frame by its rotary movement presenting an edge of two sickle-sections to the grinding-wheel on opposite sides of the center of such wheel and means for limiting said rotary movement.

2. A sickle grinder comprising a main frame, a rotatable grinding-wheel mounted therein, means for rotating said wheel, a

sickle-bar-supporting frame having a swing' ing movement on the main frame and also rotatable on said main frame in ahorizontal plane and means for adjusting and varying the' amount of such rotation. l

3. A sickle grinder comprising a main frame, a rotatable grinding-wheel mounted therein, means for rotating said wheel, a sickle-bar-supporting frame formed in two sections between which the sickle-bar is held, one of such sections being pivotally connected to the main frame so as to have a freely-swinging movement in a vertical and horizontal plane and means for drawing and holding said sections together to grasp the bar.

4. A sickle grinder comprising a main frame, a rotatable grinding-wheel mounted therein, means for rotating said wheel, a sickle-bar-supporting frame formed in two parts or sections between which the sicklebar is held, and a cam device connected to one of said sections and bearing against the other section to draw said sections together to hold the interposedsickle-bar.

5. A sickle grinder comprising a main frame, a rotatable grinding-wheel mounted therein, means for rotating said wheel, a movable base I1 having a partial rotation on the main frame, a sickle-bar-supporting frame pivotally mounted on said base and adapted to hold and present the work to the wheel.

6. A sickle-grinder 'comprising a main frame, a rotatable grinding-wheel, means for rotating said wheel, a movable base II having a partial rotation on the main frame, a sickle-bar-supporting frame formed in two sections, one section 15 being pivoted on said base and the other section 18l being normally loosely connected to the other section and having a projection extending through the section I5 and a cam 2l mounted on such projection and bearing against the section 15 to draw the sectionstogether and hold an interposed sickle-bar.

7. A sickle grinder comprising a main frame, sickle-grinding mechanism mounted therein, a movable base 1l having a partial movement on the frame and having lugs 12 depending along the sides of the frame, adjusting nuts or screws 13 in the lugs to limit the range of the movement of the base and a sickle-bar-supportin g frame connected to said base.

S. A sickle; grinder comprising a' main frame, sickle-grinding mechanism mounted therein, a movable base ll mounted on the main frame and having lugs I2 depending along the sides of the frame, adjusting nuts or screws 13 in the lugs to limit the range of the movement of the base, and asickle-bai supporting frame having arms IG pivotally mounted on said base.

9. A sickle grinder comprising a main frame, a sickle-grinding mechanism mounted therein,a sickle-bar-supporting frame mounted on the main frame and mechanism for attaching the grinder to a stationary object comprising a depending hook 23 and a depending lug 24 on the bottom of the main frame, the lug having a screw-threaded hole, a screw-threaded rod or bolt 25 received by said hole and a hook 27 loosely mounted on said rod.

IO. A sickle-grinder comprising a main4 frame, sickle-grinding mechanism mounted therein, a sickle-bar-supporting frame movably mounted on the main frame and comprising two sections I5 and 18, the section 15 having a plurality of arms or projections 17 having their free ends turned at right angles and the section IS having armsor lingers 19 inturned and in close proximity to the said free ends and means for holding the two sections together to Y grasp the sickle-bar and knives therebetween.

A JAMES MAornAIL.

ICO 

